Honda civic won't accelerate?

Got car idling and everything fine no leaks. Drove it around block just getting to 20-25 mph I go to get on it and the car doesn't go anywhere it falls on it's face. I tightend up throttle cable and that did nothing. It's a y7 motor with a 4-2-1 header, skunk2 intake and skunk2 76mm throttle body. I thinking it may be ecu but not for sure. Anyone got a clue why it's doing this. I have to have car running in 2 days

It's not the ecu.
Fuel delivery sounds suspect to me or weak ignition when you ask for extra fuel.
You have removed the spark plugs to examine them?